Vapor-blowpipe.



No. 628,222. Paiented July 4, |899. W. E. HEWIT.

VAPOR BLDWPIPE.

(Application led Kar. 30, 1898.)

2 Sheets-Sheet I.

(No Model.)

n: mums Puras co. Puofoumo. wnsmwm'm n c Patented July 4, |899.

2 Sheets--Sheet 2.

W. E. HEWIT.

VAPOR BLUWPIPE,

(Apphcatlon led Mar 30, 1898) yJIoModel.)

Wigasses UNITED STATES PATENT OFFICE.

\VILLlAM E. HEiVl'l, OF DAVID CITY, NEBRASKA.

VAPOR-BLOWPIPE.

SPECIFICATION forming part of Letters Patent No. 628,222, dated July 4,1899.

Application filed March 30, 1898.

To @ZZ whom i may concern,.- i

Be it known that l, WILLIAM E. lIEwIT, a g citizen of the United States,residing at David City, in the county of Butler and State of i Nebraska,have invented a new and useful Vapor-Blowpipe,'of which the following isa specification.

My invention relates to blowpi pes, and particularl y to avapor-blowpipe adapted for use in connection with metallurgicalexperiments and operations, and more especially in con- ,Y

nection with dentistry; and the object in view is to provide a blowpipeof simple construction whereby the current of air passing therethroughmay be charged with an iml, iiammable vapor for intensifying the heat ofthe iiame through which the current of vapor- I charged air passes, and,furthermore, to provide, in connection with the blowpipe, im-g provedmeans for maintainingl a uniform flow f of air and for controlling thesame with fay cility to produce the desired results. i,

Further objects and advantages of this ini Vention will appear in thefollowing description,` and the novel features thereof will beparticulary pointed out in the appended y claims. 'y

In the drawings, Figure l is a side view of ,i a blowpipe constructed inaccordance with my invention. Fig. 2 is a longitudinal sec- 2 tionalview of the same. Fig. 3 is a detail l view of the shell detached. Fig.i isa transverse section on the plane indicated by the Q line 4 4 ofFig. 2. Fig. 5 is a transverse section on the line 5 5 of Fig. Fig. b isa partial longitudinal section showing a slightlymodified construction.Fig. is a detaillonj gitudinal section of the socket and means ofattachment for the tip of the blowpipe-nozzle, the slide being shownextended. Fig. S is a i detail view of the slide detached. Fig. Q is adetail view of the socket and contiguous portion of the fixed nozzlemember. Fig. l0 is a detail sectional view of a portion of the slide fand the contiguous end of the tipto show the arrangement of the partsprior to inserting i the tip into the seat of the slide. Fig. ll is aside View of another modified construction, showing a different form ofnozzle. Fig. l2 i is a longitudinal section of the modified constructionillustrated in Fig. ll. i

Serial No. 675,724. (No model.)

Similar numerals of reference indicate corresponding parts in all theiigu res of the drawings.

l designates the barrel or cylinder of the blowpipe embodying myinvention, and in communication therewith is a mouthpiece 2, which maybe of the ordinary or any preferred construction, preferably tapered orreduced in diameter slightly toward itis point of connection with thecylinder, and 3 represents the blowpipe-nozzle interchangeably fitted tothe body portion or cylinder of the device to provide for thesubstitution therefor of others adapted for the particular operation t0be performed.

' In the construction illustrated the body portion or cylinder of theblowpipe is provided with a reduced valve-chamber 4,Which in turn isextended to form a nipple 5, in which is fitted the end of the nozzle 3,and in the valve-chamber is mounted a controlling or throttle valve G,having an exposed fingerhold or knob 7 to facilitate the manipulation ofthe valve. Arranged transversely in the cylinder contiguous to thevalve-casing, but spaced a distance from the end of the cylinder to forman outlet-chamber l, is a partition 8, upon opposite sides of which andformed in the wall of the cylinder are inlet and exhaust ports 9 and l0,communicating with a chamber l1, having an extension forming a nipplel', upon which is fitted an expansible accumulator 13, which in theconstruction illustrated consists of a rubber bag. It is obvious thatair forced into the cylinder of the blowpipe through the mouthpiece 2may pass through the offset chamber ll, which forms a conductorconnecting the main and auxiliary compartments or chambers of thecylinder, and thence through the valvecasing to the nozzle; butin orderthat a quantity of air under pressure may be accumulated to supply thenozzle during the time that air is not being forced through themouthpiece (as while the operator is taking breath) I atta-ch theabove-described accumulator 13 to the extension ornipple of theconductorll and provide the mouthpiece at its inner end IOO maincompartment or chamber ot' the cylinder into the conductor 11, fromwhich a portion of the blast finds its way to the accumulator,wherebywhen the inflow of air through the mouthpiece ceases the contraction ofthe accumulator will maintain a continuous blast through the nozzleunless prevented by the closing of the throttle-valve 4.

Removably fitted in the main chamber of the cylinder is a shell 15,preferably of cylindrical construction, with its front end open and itsrear end fitted with a perforated head 1G, located contiguous to the endof the mouthpiece, said shellfltting snuglyin the cylinder and beingadapted to cont-ain an absorbent filling 17, of' wool or cotton or theequivalent thereof, charged with gasolene, alcohol, or otherinfiammablefiuid for evaporation in order to charge the blast of air as it passesthrough the blowpipe. Hence in practice it will be seen that all of theair which enters the cylinder from the mouthpiece passes through theshell with its absorbent filling and thence through an offset conveyercommunicating with the cylinder by lateral ports located, respectively,upon opposite sides of a transverse partition, by which the forcing ofthe absorbent filling from the open end of the shell is prevented, andthat in communication with said offset conveyer is an expansible orinfiatable accumulator adapted, under the control of a suitable valve,to supply a continuous current of fluid to the dischargetip, whether theblast which is introduced through the mouthpiece is continuous or not.In the construction illustrated in Figs. 1 to 5, inclusive, themouthpiece is attached to a cylinder-head which is removably threadedupon the end of the cylinder, whereas in the modified constructionillustrated in Fig. 6 the mouthpiece 2a is attached directly to the endof the movable shell l5, the latter construction being desirable asinvolving a simplification of the construction shown in the otherfigures of the drawings in that one of the detachable parts of theconstruction set forth in connection with Figs. 1 to 5 is avoided.

The construction of nozzle illustrated in Figs. 1, 2, and 7 to 10,inclusive, includes a main or fixed member 18, attached, as aboveindicated, to the nipple 5, and a tip 19, having any desiredconstruction and size of terminal discharge-opening, said tip beingprovided with a tapered or conical inner end 20, which is adapted to befitted in a conical seat 21 in the outer extremity of the main or fixedmember 18, a collar 22 being carried by the tip to bear against theenlarged extremity of said main member. Mounted for axial movement uponthe nozzle member 1S isa tubular slide 23, having acontracted inner endforming a shoulder 24, between which and an eX- terior shoulder 25 onthe nozzle memberlS is interposed an actuating-spring 26, the same beingcoiled around the nozzle member 18 to maintain the slide normally in theposition illust-ratedin Fig. 2 or retracted. Atits outer end this slideis provided with a T- shaped lateral opening 2T, communicating with aradial slot 2S in the closed end of the slide, and when it is desired toattach a tip to the fixed nozzle member the slide is advanced againstthe tension of the spring 2G to the position illustrated in Fig. 7. Theinner end of the tip is dropped through the opening 27 in the side ofthe slide to arrange its straight portion in axial alinement with thenozzle member 18, after which the slide is released to allow itsactuating-spring to draw the tip back and 'securely fit the reducedtapered or conical portion 2O of the tip in the seat 21. This forms anair-tight joint between the tip and the fixed nozzle member and alsoprovides for displacing the tip and substituting another withoutnecessitating the grasping of the tip in the hand of the operator.Obviously this tip becomes heated in operation, particularly when thedevice is used in connection with a Buusen or other burner, and

it is desirable to provide for displacing the tip without grasping thesame.

In Figs. 11 and 12 I have shown a construction which differs 4from thatillustrated in Figs. 1 and 2 only in the matter of the nozzle 3, whichis of simple construction and without the removable tip shown in Figs. 1and 2. The nozzle 3 is shown applied exterior-ly to a nipple 5, whichcorresponds in position and function with the nipple 5. (Illustrated inFigs. 1 and 2.)

It will be understood that within the scope of the claims variouschanges in the form, proportion, and the minor details of constructionmay be resorted to without departing from the spirit or sacrificing anyof the advantages of' this invention.

Having described my invention, what 1 claim is 1. A blowpipe having ahollow body port-ion provided with an intermediate partition, a passageconnecting the interior of the body portion at opposite sides of theplane of the partition, a mouthpiece and a tip communieating with theopposite ends ot' the body portion, and an open-ended shell, containingan absorbent filling, removably fitted in said body portion with itsopen end adjacent to said partition, substantially as specified.

2. A blowpipe having a body portion provided at an intermediate pointwith a transverse partition, and an offset conveyer in communication bylateral port-s with the interior of the body portion respectively uponopposite sides of the plane of the transverse partition therein, a shellfor absorbent filling removably tted in the body portion with an openend arranged adjacent to the transverse partition thereof', and amouthpiece and tip in communication with the body portion, substantiallyas specified.

3. A blowpipe having a cylinder divided by a transverse partition toform main and auxiliary compartments connected by an offsetconveyerwhich is in communication with IOO IOS

IIO

an expansible accumulator, a valve for controlling the cylinder-outletwhich is in communication with the auxiliary compartment thereof, acylindrical shell removably fitted in the cylinder and containing anabsorbent filling, the end of the shell contiguous to said partitionbeing open, and the other end being perforated, and a mouthpiecedetachably connected with the cylinder and having a checkvalve toprevent back pressure, substantially as specified.

4. A blowpipe having anozzle of which one member is provided at itsouter end with a conical or tapered seat, a tip having a tapered innerextremity removably fitted in said seat, and a slide mounted upon theiirst-named member for movement parallel with the longitudinal axis ofthe seat and provided with means to engage and secure the tip in theseat, substantially as specified.

5. A blowpipe having a nozzle of which one member is provided at itsouter end with a terminally-open seat, a tip removably fitted at itsinner end in said seat and provided with a collar covering the mouth ofthe seat at the outer end of said member, and a slide fitted upon thenozzle member for movement parallel therewith and with the longitudinalaxis of the seat and engaged with the collar of the tip to maintain theend of the tip in said seat;

substantially as specified.

C. A blowpipe having a nozzle of which one member is provided at itsouter extremity with a seat, a tip removably tted at its inner end insaid seat, and a spring-actuated slide fitted upon the nozzle member andengaged with the tip to maintain the latter in the seat, substantiallyas specified.

7. A blowpipe having a nozzle of which one member is provided at itsouter extremity with a seat, a tip removably fitted at its inner end insaid seat and provided with a collar, a slide mounted upon the nozzlemember and provided at its outer end with a lateral opening, throughwhich the inner end of the may be inserted laterally for alinement withthe seat in the nozzle member, and means for yeldingly maintaining theslide in its retracted position with the extremity of the tip in theseat oi" the nozzle member, substantially as specified.

In testimony that I claim the foregoing as my own I have hereto alixedmy signature in the presence of two witnesses.

VILLIAM E. HEWIT.

Witnesses:

W. P. FLYNN, Y W. S. McCoy.

tip is

